A kind of recyclable plastic particles and preparation system and preparation method

Abstract

The invention belongs to the technical field of plastic granulation, and particularly relates to a recyclable and renewable plastic granule and a preparation system and a preparation method, comprising the following steps: step one: washing and crushing the recycled renewable plastic product; step two: adding plastic fragments and additives into a granulation system for melting, conveying and extruding to form a plurality of plastic strips; step three: cooling and cutting the plurality of plastic strips to form plastic granules; step four: sieving the plastic granules; step five: drying the plastic granules and then packaging them; the beneficial effect is that it can be used to manufacture dyed and non-dyed plastic strips without causing pollution to the inside of the equipment, and the recycled plastic is 80-100 parts, the colorant is 0.8-1 part, the wear-resistant agent is 5-8 parts, the compatibilizer is 4-6 parts, the flame retardant is 3-5 parts, the plasticizer is 8-10 parts and the dispersant is 5-8 parts.

Description

Technical Field

[0001] The invention belongs to the technical field of plastic granulation, and in particular relates to a recyclable plastic granule and a preparation system and a preparation method. Background Art

[0002] Recycled plastics are the reuse of plastics. After being crushed by mechanical blades, the plastics are reused. Recycled plastics refer to plastic raw materials obtained after processing waste plastics through physical or chemical methods such as pretreatment, melt granulation, and modification. It is the reuse of plastics.

[0003] Since ordinary screw extruders can only produce plastic strips of one color, the residual material inside will pollute the color of the plastic strip after the color is changed, making the color of the extruded plastic strip fail to achieve the expected effect. Therefore, a device is needed that is suitable for manufacturing dyed and non-dyed plastic strips without causing pollution to the inside of the equipment. Summary of the invention

[0004] In view of this, the technical problem to be solved by the present invention is to provide a recyclable plastic particle and a preparation system and method, which can be used to manufacture dyed and non-dyed plastic strips without causing pollution to the inside of the equipment.

[0005] The present invention provides a method for preparing recyclable plastic particles, comprising the following steps:

[0006] Step 1: Wash and crush the recycled plastic products;

[0007] Step 2: Add the plastic fragments and additives into the granulation system for melting, conveying and extrusion to form multiple plastic strips;

[0008] Step 3: Cooling and cutting the multiple plastic strips into plastic pellets;

[0009] Step 4: Screening the plastic particles;

[0010] Step 5: Dry the plastic particles and then package them.

[0011] The granulation system includes a base, an extrusion barrel is fixedly connected to the base, a first screw is rotatably connected in the extrusion barrel, a plurality of first discharge holes are provided on the extrusion barrel, an insert block is fixedly connected to the end of the first screw, two limit rods are fixedly connected to the extrusion barrel, a mixing barrel is slidably connected to the two limit rods, the mixing barrel contacts the extrusion barrel, a plurality of second discharge holes are provided on the mixing barrel, a second screw is rotatably connected in the mixing barrel, a groove is provided at the end of the second screw, a stirring portion is fixedly connected to the middle of the second screw, and a distributing roller is rotatably connected in the mixing barrel.

[0012] Two sliding bars are fixedly connected to the base, cooling plates are slidably connected to the two sliding bars, a cutter is fixedly connected to the base, and springs are fixedly connected between the cooling plate and the two sliding bars.

[0013] The lower end of the cooling plate is fixedly connected with a screen box. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0015] Figure 1 A flow chart of a method for preparing recyclable plastic particles;

[0016] Figure 2 and Figure 3 and Figure 4 It is the overall structural diagram of the granulation system;

[0017] Figure 5 It is a schematic diagram of the structure of the extrusion barrel;

[0018] Figure 6 Schematic diagram of the first screw structure;

[0019] Figure 7 It is a schematic diagram of the structure of the mixing cylinder;

[0020] Figure 8 It is a structural schematic diagram of the stirring part;

[0021] Fig. 9 Schematic diagram of the cooling plate structure.

[0022] Fig.10 This is a schematic diagram of the structure of a hollow slab. DETAILED DESCRIPTION

[0023] The present invention is described in detail with reference to the accompanying drawings in the embodiments of the present invention.

[0024] A method for preparing recyclable plastic particles comprises the following steps:

[0025] Step 1: Wash and crush the recycled plastic products;

[0026] Step 2: Add the plastic fragments and additives into the granulation system for melting, conveying and extrusion to form multiple plastic strips;

[0027] Step 3: Cooling and cutting the multiple plastic strips into plastic pellets;

[0028] Step 4: Screening the plastic particles;

[0029] Step 5: Dry the plastic particles and then package them.

[0030] See also Figure 2-8 , showing a schematic diagram of an embodiment of the present invention that does not cause pollution to the interior of the device under the premise of being applicable to manufacturing dyed and non-dyed plastic strips, further,

[0031] The granulation system includes a base 402, on which an extrusion barrel 101 is fixedly connected by bolts, a first screw 102 is rotatably connected in the extrusion barrel 101 through a bearing, a plurality of first discharge holes 103 are provided on the extrusion barrel 101, an insert block 104 is welded and fixedly connected to the end of the first screw 102, two limit rods 307 are welded and fixedly connected to the extrusion barrel 101, a mixing barrel 301 is slidably connected to the two limit rods 307, and two limit holes are provided on the mixing barrel 301, and the two limit holes are respectively matched with the two limit rods 307 To achieve sliding, the mixing cylinder 301 contacts the extrusion cylinder 101, a plurality of second discharge holes 303 are provided on the mixing cylinder 301, a second screw 302 is rotatably connected to the mixing cylinder 301 through a bearing, a groove 304 is provided at the end of the second screw 302, a stirring portion 305 is fixedly connected to the middle of the second screw 302 through bolts, a dividing roller 308 is rotatably connected to the mixing cylinder 301 through a bearing, a feed hopper is welded above the mixing cylinder 301, the dividing roller 308 is located directly below the feed hopper, and an electric heating device is externally connected to the extrusion cylinder 101.

[0032] When using the device, first control the mixing barrel 301 to slide forward on the two limit rods 307 so that the mixing barrel 301 is separated from the extrusion barrel 101. The staff turns on the electric heating device to heat it so that the extrusion barrel 101 is preheated. Then, the crushed recycled plastic fragments and additives are poured into the extrusion barrel 101 from the opening on the extrusion barrel 101. At this time, the first screw 102 is controlled to rotate, so that the first screw 102 can convey the plastic fragments forward. Since the extrusion barrel 101 is heated in advance, the plastic fragments can be melted in the process of conveying the plastic fragments, so that the plastic is in a liquid state. After extrusion, the plastic is discharged in the form of strips from the multiple first discharge holes 103 at the front end of the extrusion barrel 101 to form multiple plastic strips. At this time, the undyed plastic strips are prepared.

[0033] Since ordinary screw extruders can only produce plastic strips of one color, the residual material inside the extruder after the color is changed will pollute the color of the plastic strip, making the color of the extruded plastic strip fail to achieve the expected effect. Therefore, a mixing barrel 301 is installed in the present device. When it is necessary to prepare dyed plastic strips, the staff controls the mixing barrel 301 to slide backward on the two limit rods 307, so that the mixing barrel 301 is fastened to the extrusion barrel 101, and the plug 104 on the first screw 102 is inserted into the groove 304 on the second screw 302, and then the dye powder is added to the feed hopper on the extrusion barrel 101. After the plastic strips are extruded in the extrusion barrel 101, they are directly discharged into the mixing barrel 301, and then the first screw 102 rotates to drive the second screw 302 to rotate, and the second screw 302 rotates. The rod 302 can mix the plastic strips and continue to convey them. When the plastic is conveyed to the middle of the mixing drum 301, the second screw 302 drives the stirring part 305 to rotate to stir the plastic. At the same time, the stirring part 305 continuously drives the dividing roller 308 to rotate. The dividing roller 308 can separate the colorant powder in the feed hopper. When the dividing roller 308 rotates, the colorant powder can automatically fall into the mixing drum 301. With the continuous stirring of the stirring part 305, the plastic can be fully mixed with the colorant powder. Since the blades of the stirring part 305 are provided with through grooves, the stirring effect on the plastic can be enhanced. Finally, after the transmission of the second screw 302, the plastic can be squeezed out from the multiple second discharge holes 303 on the mixing drum 301 to make dyed plastic strips.

[0034] See also Figure 9-10 , shows a schematic diagram of an embodiment of the present invention in which a plastic strip can be cut into plastic particles, and further,

[0035] Two sliding rods 403 are fixedly connected to the base 402 by bolts, and a cooling plate 401 is slidably connected to the two sliding rods 403. Two matching holes are provided on the cooling plate 401, and the two matching holes are respectively matched with the two sliding rods 403 to realize sliding. A cutter 504 is fixedly connected to the base 402 by bolts, and springs 404 are respectively welded and fixedly connected between the cooling plate 401 and the two sliding rods 403, and a plurality of strip grooves are provided on the cooling plate 401.

[0036] The staff places the extruded plastic strips on the cooling plate 401, and then pours cold water into the rear end of the cooling plate 401, so that the cold water flows forward along the cooling plate 401, and then the multiple plastic strips are transported forward along the multiple strip-shaped grooves under the push of the water flow. The cold water accelerates the cooling of the plastic strips, so that the plastic strips can be quickly formed and easy to cut. When the multiple plastic strips move between the cooling plate 401 and the cutter 504, the staff controls the cooling plate 401 to slide back and forth on the two sliding bars 403, so that the cooling plate 401 cooperates with the cutter 504 to cut the plastic strips to obtain plastic particles. The two springs 404 enable the cooling plate 401 to have an automatic reset function when it moves back and forth.

[0037] See also Fig. 9 , showing a schematic diagram of an embodiment of the present invention capable of screening plastic particles, further,

[0038] The lower end of the cooling plate 401 is fixedly connected with a screen box 406 by bolts.

[0039] When using this device, the cooling plate 401 drives the screen box 406 to move back and forth, and the cut plastic particles fall into the screen box 406. Since the screen box 406 is inclined, the plastic particles can roll downward, and the reciprocating movement of the screen box 406 can be used to screen the plastic particles. Plastic particles of different sizes and shapes can fall from the sieve holes on the screen box 406, while the agglomerated and connected plastic particles are retained in the screen box 406.

[0040] See also Fig.10 , shows a schematic diagram of an embodiment of the present invention capable of accelerating the screening of plastic particles, and further,

[0041] The lower end of the cutter 504 is fixedly connected to the hollow plate 502 by bolts. The interior of the hollow plate 502 is hollow and a slot is opened at the lower end. A scraper 501 is slidably connected inside the hollow plate 502. A spring piece 503 is welded and fixedly connected between the cutter 504 and the hollow plate 502. The scraper 501 contacts the inner bottom surface of the screen box 406.

[0042] Under normal conditions, the scraper 501 can be pressed against the bottom surface of the screen box 406 due to the elasticity of the spring piece 503. When the screen box 406 moves, the scraper 501 is retracted and expanded in the hollow plate 502 under the elastic action of the spring piece 503, and the scraper 501 and the screen box 406 produce relative movement, so that the scraper 501 can continuously collide with the plastic particles, making the movement amplitude of the plastic particles larger, thereby accelerating the screening. The scraper 501 can scrape the plastic particles stuck in the sieve holes to avoid blockage.

[0043] See also Figure 6 and Fig. 9, shows a schematic diagram of an embodiment of the present invention capable of controlling the reciprocating movement of the cooling plate 401, further,

[0044] The rear end of the cooling plate 401 is welded and fixedly connected with a contact rod 405 . The lower end of the extrusion cylinder 101 is rotatably connected with a rotating shaft 203 via a bearing. A spiral plate 204 is fixedly connected to the rotating shaft 203 via bolts. The spiral plate 204 contacts the contact rod 405 .

[0045] The staff controls the rotating shaft 203 to rotate clockwise, and then the rotating shaft 203 drives the spiral plate 204 to rotate clockwise. Normally, under the action of the two springs 404, the contact rod 405 can be pressed against the spiral plate 204. Since the spiral plate 204 is spiral, as the spiral plate 204 rotates, the spiral plate 204 reversely squeezes the contact rod 405 to make the cooling plate 401 move back and forth.

[0046] See also Figure 4-6 , shows a schematic diagram of an embodiment of the present invention capable of realizing synchronous control of the cooling plate 401 and the first screw 102, further,

[0047] The extruder 101 is connected to the rotating shaft 203 via a pulley 202, which is a combination of two pulleys and a belt. The pulley at one end of the pulley 202 is fixedly connected to the first screw 102 via a key, and the pulley at the other end of the pulley 202 is fixedly connected to the rotating shaft 203 via a key.

[0048] While the staff controls the rotation of the first screw 102, they can drive the rotating shaft 203 to rotate through the pulley 202, thereby achieving the effect of synchronous control of the cooling plate 401 and the first screw 102, thereby avoiding the risks of material stacking and material breakage caused by separate control.

[0049] See also Figure 7-8 , showing a schematic diagram of driving the first screw rod 102 to rotate according to the present invention, further,

[0050] The extrusion barrel 101 is fixedly connected to a driving motor 201 via bolts, and the first screw 102 is fixedly connected to an output shaft of the driving motor 201 via a coupling.

[0051] The driving motor 201 is started, and the driving motor 201 drives the first screw rod 102 to rotate.

[0052] See also Figure 5 , showing the intention of controlling the sliding of the mixing cylinder 301 according to the embodiment of the present invention, further,

[0053] The extrusion cylinder 101 is fixedly connected to the cylinder 306 by bolts, and the mixing cylinder 301 is fixedly connected to the moving end of the cylinder 306 by bolts.

[0054] The staff controls the extension and retraction of the moving end of the cylinder 306 , thereby driving the mixing barrel 301 to slide on the two limiting rods 307 .

[0055] The plastic particles include the following raw materials in parts by weight: 80 parts of recycled plastic, 0.8 parts of colorant, 8 parts of wear-resistant agent, 6 parts of compatibilizer, 3 parts of flame retardant, 80 parts of plasticizer and 5 parts of dispersant.

Claims

1. A method for preparing recyclable plastic particles, characterized in that: The following steps are involved: Step 1: Wash and crush the recycled renewable plastic products to obtain plastic fragments; Step 2: Add the plastic fragments and additives into the granulation system for melting, conveying and extrusion to form multiple plastic strips; Step 3: Cooling and cutting the multiple plastic strips into plastic pellets; Step 4: Screening the plastic particles; The granulation system comprises a base (402), an extrusion barrel (101) is fixedly connected to the base (402), a first screw (102) is rotatably connected inside the extrusion barrel (101), a plurality of first discharge holes (103) are provided on the extrusion barrel (101), an insert block (104) is fixedly connected to the end of the first screw (102), two limit rods (307) are fixedly connected to the extrusion barrel (101), and a mixing barrel is slidably connected to the two limit rods (307). (301), the mixing cylinder (301) is in contact with the extrusion cylinder (101), a plurality of second discharge holes (303) are provided on the mixing cylinder (301), a second screw (302) is rotatably connected in the mixing cylinder (301), a groove (304) is provided at the end of the second screw (302), a stirring portion (305) is fixedly connected in the middle of the second screw (302), and a material distribution roller (308) is rotatably connected in the mixing cylinder (301); A feed hopper is welded on the side of the extruder (101), and a material distribution roller (308) is located directly below the feed hopper; when preparing the dyed plastic strip, the staff controls the mixing cylinder (301) to slide backward on the two limit rods (307), so that the mixing cylinder (301) is fastened to the extruder (101), the insert block (104) on the first screw (102) is inserted into the groove (304) on the second screw (302), and then the dye powder is added into the feed hopper on the extruder (101). The base (402) is fixedly connected to two sliding rods (403), the two sliding rods (403) are slidably connected to a cooling plate (401), the base (402) is fixedly connected to a cutter (504), and springs (404) are respectively fixedly connected between the cooling plate (401) and the two sliding rods (403); the extrusion barrel (101) is fixedly connected to a cylinder (306), and the mixing barrel (301) is fixedly connected to the moving end of the cylinder (306).

2. A method for preparing recyclable plastic particles according to claim 1, characterized in that: The lower end of the cooling plate (401) is fixedly connected to a screen box (406).

3. A method for preparing recyclable plastic particles according to claim 2, characterized in that: The lower end of the cutter (504) is fixedly connected to a hollow plate (502), a scraper (501) is slidably connected inside the hollow plate (502), a spring (503) is fixedly connected between the cutter (504) and the hollow plate (502), and the scraper (501) is in contact with the inner bottom surface of the screen box (406).

4. A method for preparing recyclable plastic particles according to claim 3, characterized in that: The rear end of the cooling plate (401) is fixedly connected to a contact rod (405), the lower end of the extrusion cylinder (101) is rotatably connected to a rotating shaft (203), a spiral plate (204) is fixedly connected to the rotating shaft (203), and the spiral plate (204) is in contact with the contact rod (405).

5. A method for preparing recyclable plastic particles according to claim 4, characterized in that: The extrusion cylinder (101) and the rotating shaft (203) are connected via a pulley (202); one end of the pulley (202) is fixedly connected to the first screw rod (102), and the other end of the pulley (202) is fixedly connected to the rotating shaft (203).

6. A method for preparing recyclable plastic particles according to claim 5, characterized in that: The extrusion cylinder (101) is fixedly connected to a driving motor (201), and the first screw (102) is fixedly connected to an output shaft of the driving motor (201).

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